When Endogenous Rhythms Are Studied by Removing All External Cues

question 45

Multiple Choice

When endogenous rhythms are studied by removing all external cues for what time of day it is,what duration of circadian rhythm do most people adopt?

• A)a rhythm that is between 23 and 24 hours long
• B)a rhythm that is 24 to 25 hours long
• C)a rhythm that is 25 to 26 hours long
• D)People do not establish a normal rhythm when cues about time of day are removed.

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